File 'backup/backup.sql' does not exist [code -4]

Hi Drew,

I get the message from the Apps dropdown, when I click on the Backup App

Redacted:

Perch: 2.8.32
Production mode: (PERCH_DEVELOPMENT)
Installed apps: content (2.8.32), assets (2.8.32), categories (2.8.32), perch_backup (1.2)
DB driver: PDO
DB tables: perch2_categories (0), perch2_category_counts (0), perch2_category_sets (0), perch2_content_index (2411), perch2_content_items (526), perch2_content_regions (65), perch2_navigation (0), perch2_navigation_pages (0), perch2_page_templates (1), perch2_pages (31), perch2_resource_log (251), perch2_resource_tags (0), perch2_resources (63), perch2_resources_to_tags (0), perch2_settings (11), perch2_user_passwords (0), perch2_user_privileges (28), perch2_user_role_privileges (16), perch2_user_roles (2), perch2_users (2)
Users: 2
App runtimes:
<?php
    $apps_list = array(
        'content', 
        'categories',
    );
Editor plug-ins: ace
H1: c2363991e8aa08dce658fe7b42dd9f96
L1: 8da62c38261037789cd5262544577b63
F1: 2edba60ed1f613d6dd804feb202456a2
headerColour: #ffffff
content_singlePageEdit: 1
helpURL:
siteURL: /
hideBranding: 0
content_collapseList: 1
lang: en-gb
update_2.8.31: done
latest_version: 2.8.15
on_sale_version: 2.8.32
update_2.8.32: done
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_DB_SERVER: localhost
PERCH_DB_DATABASE: 
PERCH_DB_USERNAME: 
PERCH_DB_PREFIX: perch2_
PERCH_TZ: Australia/Sydney
PERCH_EMAIL_FROM:
PERCH_EMAIL_FROM_NAME:
PERCH_LOGINPATH: /perch
PERCH_PATH: 
PERCH_CORE: 
PERCH_RESFILEPATH: 
PERCH_RESPATH: /images
PERCH_HTML5: 1
PERCH_DEBUG:
PERCH_PRODUCTION_MODE: PERCH_DEVELOPMENT
PERCH_RUNWAY:
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_RUNWAY_ROUTED:
PERCH_STRONG_PASSWORDS:
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH:
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_RWD:
PERCH_HTML_ENTITIES:
PERCH_SSL:
PERCH_STRIPSLASHES:
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_PARANOID:
PERCH_FORCE_SECURE_COOKIES:
PERCH_PASSWORD_MIN_LENGTH: 6
PERCH_MAX_FAILED_LOGINS: 10
PERCH_AUTH_LOCKOUT_DURATION: 1 HOUR
PERCH_VERIFY_UPLOADS:
PERCH_AUTH_PLUGIN:
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT:
PERCH_DB_SOCKET:
PERCH_SESSION_TIMEOUT_MINS: 20
HOSTING SETTINGS

PHP: 7.0.12
Zend: 3.0.0
OS: Linux
SAPI: litespeed
Safe mode: not detected
MySQL client: 5.6.33
MySQL server: 5.6.33
Free disk space: 391.92 GB
Extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bz2, calendar, ctype, curl, hash, filter, ftp, gettext, gmp, SPL, iconv, pcntl, readline, Reflection, session, standard, shmop, SimpleXML, mbstring, tokenizer, xml, litespeed, bcmath, dom, fileinfo, gd, imap, intl, json, exif, mcrypt, mysqli, mysqlnd, PDO, pdo_mysql, pdo_sqlite, Phar, posix, pspell, soap, sockets, tidy, wddx, xmlreader, xmlrpc, xmlwriter, xsl, zip
GD: Yes
ImageMagick: No
PHP max upload size: 8M
PHP max form post size: 8M
PHP memory limit: 128M
Total max uploadable file size: 8M
Resource folder writeable: Yes
Session timeout: 24 minutes
Native JSON: Yes
Filter functions: Yes
Transliteration functions: Yes
HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_ACCEPT_ENCODING: gzip, deflate, sdch, br
HTTP_ACCEPT_LANGUAGE: en-GB,en;q=0.8
HTTP_COOKIE: _ga=GA1.3.1484652858.1477519860; cmsa=1; PHPSESSID=83k0godfm56lft636e6qckjoa5
HTTP_HOST: 
HTTP_REFERER: 
HTTP_USER_AGENT: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36
HTTP_UPGRADE_INSECURE_REQUESTS: 1
HTTP_DNT: 1
DOCUMENT_ROOT: 
REMOTE_ADDR: 59.167.232.140
REMOTE_PORT: 49400
SERVER_ADDR: 103.252.154.19
SERVER_NAME: 
SERVER_ADMIN: 
SERVER_PORT: 443
REQUEST_URI: /perch/core/settings/diagnostics/?extended
HTTPS: on
REDIRECT_STATUS: 200
X_SPDY: HTTP2
SSL_PROTOCOL: TLSv1.2
SSL_SESSION_ID: 43276a97428b603daeffe97507562578aa544274f1113c28a6e02ad53d4f8978
SSL_CIPHER: ECDHE-RSA-AES128-GCM-SHA256
SSL_CIPHER_USEKEYSIZE: 128
SSL_CIPHER_ALGKEYSIZE: 128
SCRIPT_FILENAME: 
QUERY_STRING: extended
SCRIPT_URI: 
SCRIPT_URL: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php
SERVER_PROTOCOL: HTTP/1.1
SERVER_SOFTWARE: LiteSpeed
REQUEST_METHOD: GET
PHP_SELF: /perch/core/settings/diagnostics/index.php
REQUEST_TIME_FLOAT: 1477607736.2122
REQUEST_TIME: 1477607736

No Drew, I don't.

The message occurs when I click the backup button for any backup type, although it is shown that my server supports all backup types.